The comparative efficacy of cephalexin and sulfisoxazole in acute urinary tract infection in children.

A double blind, comparative study of the efficacy of cephalexin versus sulfisoxazole was conducted on 100 children with initial episodes of urinary tract infections. The overall bacteriologic and clinical cure rates were comparable for both antimicrobials. Children treated with cephalexin had a clinical cure rate of 86 per cent and a bacterial cure rate of 84 per cent, while those given sulfisoxazole were found to have rates of 82 and 92 per cent respectively. However, cephalexin was noted to have a rather high rate of failure in the therapy of Proteus micrabilis infections (4/8), casting some doubt on its use in urinary infections caused by the organism. Untoward effects associated with either medication were minimal.